Dowel pin and mortise lock



f 'I 15 the spe'cification.

socket;

- latented i Sept. 23, T930 i Janas 3. GILPVI, or Rooimsr'nsn, NnwpYoBx p DowEL PIN ANDMoR'rIs Loox. I

Appucationma April 9,:

My present invention relates to woodworkingV and more' particularly to metallic` devices for the purpose' of looking dowel pins, tenonsand 'the like in mortise' joints, such as the rungs of chairs, ladders, let cetera, and it 'has vforits object to provide' a device of this character so simple that' it can be produced at'small cost and which, how'ever, will be most veffective and efficient in use.

' Tothese Vand .other e'nds the inventionresides in certain `improvements and combinations of parts, alla's wlll be' herelnafter morefully described, the novel features' be-v ng pointed out'iny` the claims at the end of lIn the drawings:

Fig. 1 is a collective view of a mortise and` tenon or, specifically, a `mortise 'and dowel j a' pin with a fastener constructed accord- '29 ancefiwithand illustratlng one embodlment 'of'my inventiominposition on the tenon for the operation of driving it intoits mortise or Fig. 2 is a similar view. partly in section,

' showing the dowel driven into its socket and the' fastener thereby expanded into operative position; i V w i V Fig. 3 isaperspective -view of Vthe peg or` nail portion of'the fastener, inverted; 4

. Fig'. V4 is a plan 'view of the fastening elev w mentktaken from,thatface which is placedV against the end of the tenon or dowel;

Fig. 5 vis a view similan; to Fig., 1, showing f V4-amodification oftheinvention as applied to 'p l i a reotangular or other' non-ciroular mortise 6-is a view similar to Fig.,2 of the I incluslve, the mode of operatlon 1s the same Vsame modification;

Fig. 7 is anlend view of the joint of the w l modification after assembly;

? '[45 ter.

Similar reference numerals throughout the several views indicate thesame parts.v ;A difliculty that I found with prior lockzing devices of this characterires'ides in the `501-'fact that the looking elements lis drivenV into the disk is thenequal to'the diameter of the i the bottom of the socket.

SerialV li'ot. 7

the walls 'of the socket or mortise i'nl'siich, a manner that it scoresthe side walls 'beforeit takes' its final zhold that its removalby a revers'e force is facilitated.) With my device, 'the looking' element`` is not dIVn-'home un- 'tilthe instant that the dowel ortenon reaches 'i through a central openingf in the" disk. The G5 1 edges of the' disk 8 'areserratedias indicated r at 6,-l providng vsharp radialf points. The 'convexf side'l of the disk is placed 'against the end'of the dowel 2. The overall diameter of doweland of-thevso'cket, as clearly shown in Fig. 1. VThe peg 4 is then driven through the disk so that it lightly contacts therewith, as also shown in Fig. 1, and the head 7 thereof covers it practically to its Very edge, being also approximately the diameter of the dowel and. socket. w When the dowelis driven home, theeffect shown in Fig. 2 is'reached, that is, disk 3 is compressed between the end of the dowel and the nail head as the latter comes flatly against The result is that the' engagingpoints 6 are driven squarely laterally into the material of the socket or mortise 1 and become a strong and Permanent .85 i

lock. z

' With the modification shown in Figs. 5 to 9` except that a rectangular tenon 2a is driven into a similarly formed mortise or socket 1a and a metallic stra-p aiprovidedwith openings atakes the` place of the disk 3. It 'has the looking prongs or serrations 6a at its ends W and is engaged .by a double pronged peg 4a fastening a rectangular head 'ZaA to flatten out the fastening element in the manner shown in Figs. 6 and 7. V

I claim as my invention: 1. In a tenon looking device adapted to be' driven into a mortise by' the receiving tenon,

7 the combination with a conoave looking plate j provided' With anchorng pi'ongs atits; mari ginsand having a centralV apertureyof a peg i extending through the said apei'tureV in the'VV plate and adapted to be driven into the end of thetenon'bythefoperation of drivingithe, 7 tenon intothe'mortis Vsaid peg beingpro- 'w 'vided with'anen'larged head ofapproxiinatei V ly .the diameter of; the reoeiving tenon and i bearing against the concave side of-'the lock' ing plate so that the priongsV-:onthe ;looking plate Will first make'oontactwith the bottoln of the mortise and will be spread llaterally linto the Walls of the mortise at that point when'the head 'of thepegei driven against w .the bottom of thefmortise and ,fiattens the .lockingvplate.-l ,A i f o i 2. In a'rtenon looking nation with amortise and a tenon' adapted -to Vhe'drive'n therein, of a eonoaye looking plate provided With anohoring"prongs` at 'its marvg'ins and havinga centralapertnfe, said plate being disposed/,with its'convex'side against 1 ,1 W the .p end of the ten'on,V ofa peg extending' through the said'flaperturefin the plateand 'i fdriven' into ,the endof. the tenon, said peg be- 'i ing provided With an.-enlaigedjhead of ap- J proximately thediametef` of the tenon and Vof the moi'tise and bearing againstthe con- .cave side oi'theiooking plate vthe prongs'of i. the latter being spread laterally into the walls of the mortise bfyY the pressure between the z .w pegihead and the endjofthe tenon asthe'i'e-` i Vslult of the lattei' having been driven into the i i 11no1'tise V w i 'w H i t JAMES R, GILPIN. f

1,776,5oo I 

